EP0820829B1 - Machine à tensionner des lames de scies à ruban - Google Patents

Machine à tensionner des lames de scies à ruban Download PDF

Info

Publication number
EP0820829B1
EP0820829B1 EP96111742A EP96111742A EP0820829B1 EP 0820829 B1 EP0820829 B1 EP 0820829B1 EP 96111742 A EP96111742 A EP 96111742A EP 96111742 A EP96111742 A EP 96111742A EP 0820829 B1 EP0820829 B1 EP 0820829B1
Authority
EP
European Patent Office
Prior art keywords
saw blade
band saw
measuring
tension
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96111742A
Other languages
German (de)
English (en)
Other versions
EP0820829A1 (fr
Inventor
Walter Oppliger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8223018&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0820829(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to DE69622032T priority Critical patent/DE69622032T2/de
Priority to DE0820829T priority patent/DE820829T1/de
Priority to EP96111742A priority patent/EP0820829B1/fr
Priority to US08/896,082 priority patent/US6105466A/en
Priority to CA002209975A priority patent/CA2209975C/fr
Publication of EP0820829A1 publication Critical patent/EP0820829A1/fr
Application granted granted Critical
Publication of EP0820829B1 publication Critical patent/EP0820829B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D63/00—Dressing the tools of sawing machines or sawing devices for use in cutting any kind of material, e.g. in the manufacture of sawing tools
    • B23D63/18—Straightening damaged saw blades; Reconditioning the side surface of saw blades, e.g. by grinding

Definitions

  • the invention relates to a band saw blade tensioning machine with a measuring station for measuring the tension in the band saw blade, comprising a flat support for the blade, and a tensioning station for rolling tension into the band saw blade.
  • band saw blade straightening machines such as those disclosed, for example, in US-A-4,852,430 representing the closest prior art yield very good results with considerably reduced handling.
  • the second prerequisite for band saw blades is that they have a defined tension contained in the band saw blade. This tension substantially consists in the circumferential length of the band saw blade being largest in the median range between back and teeth and in decreasing outwards in both directions. This tension is needed to ensure that the band saw blade lies optimally on the curved circumferential surfaces of the blade drive wheels.
  • a tensioning or truing machine for band saw blades has a tension measuring device which detects the tension in the blades and a processing unit which contains a pair of tensioning rollers moveable across the blade to effect the necessary rolling along the circumferential lines of the blades.
  • the applied pressure of the tensioning rollers is controlled in dependency of the detected tension.
  • the measuring device is positioned at a location, where the saw blade is curved and where, thus, the longitudinal tension results in a curvature across the blade. This curvature is concave at the lower surface of the blade where the measurement is effected. This has certain disadvantages because the measurements has to be made from underneath.
  • this is achieved by means for guiding the blade over a point higher in level as compared to the level of the support, said means being located at a distance before the said measuring station to the effect that the blade travels in a free curve from the said elevated point to the flat support, and thereby allowing the release of the tension of the saw blade into a curved cross-section thereof, a curved template in the measuring station across the saw blade along which template a measuring gauge is moved for touching the saw blade surface with a tracing pin, the curvature of the template being the desired curvature of the tension-released saw blade, the said measuring station generating a measuring signal, rollers disposed opposite each other above and below the band saw blade with curved surfaces and means for simultaneously pressing the rollers against the lower and upper side of the band saw blade and a control unit for processing the measuring signal and generating a control signal to the means for pressing against the rollers.
  • a further improvement of the invention consists in an additional feeler gauge for scanning the back of the saw blade and generating a second measuring signal if the back deviates from straightness.
  • a band saw blade 1 is guided by two wheels 2, 3 being part of a band saw blade tensioning machine.
  • the saw blade is travelling in clockwise direction, i.e. the upper part is moving from left to right.
  • This upper part is passing through a tensioning station 4 which is quite similar to the straightening station shown in US-A-4,852,430.
  • the tensioning station 4 contains a sensing device 5 for detecting the tension in the saw blade.
  • the saw blade is guided via a roll 12 which is positioned at a level above the measuring level of the sensing device 5 defined by the surface of flat rails 10 which support the saw blade.
  • the difference in level is about 10 to 30 cm.
  • the saw blade while travelling from the roll 12 to the support rails 10 takes a natural curve which results in release of the tension and, thus, in a curvature across the blade 1.
  • the saw blade 1 is still curved with a concave surface towards the sensing device 5. This is best seen in Fig. 3.
  • the sensing device generates an electrical signal whenever a difference from the desired tension is detected and transmits the signal to a control unit 6.
  • roller device 7 At a certain distance behind (with regard to the movement of the saw blade) the sensing device 5 a roller device 7 is positioned.
  • the roller device contains a pair of rollers 14 for rolling tension into the saw blade 1. The details of this process are explained in more detail in the following.
  • a feeler gauge 13 Located above the saw blade 1 as a part of the sensing device is a feeler gauge 13, the tracing pin of which scans the surface of the band saw blade 1.
  • the feeler gauge 13 is disposed in conventional manner on a template 11 on which it can be displaced transverse to the direction of travel of the band saw blade.
  • the template 11 has the desired curvature which is to be obtained with appropriate tension in the blade 1.
  • the template could be replaced by a straight rail or bar and the curvature could be programmed in the control unit 6.
  • the feeler gauge 13 generates the measuring signal which is conveyed to the control unit 6. In Fig. 2 the template 11 is not shown for clarity reasons.
  • roller device 7 is disposed a certain distance behind the feeler gauge 13.
  • the roller device comprises tensioning rollers 14.
  • the rollers 14 are quite similar to those of the tensioning station disclosed in US-A-4,852,430. The only difference lies in the fact that, instead of one being provided with a convex and the other with a concave running surface, both opposing rollers are provided with the same convex running surfaces. It is possible to provide a pair of rollers 14.
  • control unit 6 Based on the signal and taking into account the distance of the rollers 14 from the feeler gauge 13, the control unit 6 generates a command to a hydraulic device which exerts a pressing force onto the rollers.
  • the more precise mechanical embodiment of power transmission is also disclosed in US-A-4,852,430 and will not be described in further detail here.
  • the sensing device contains a further feeler gauge 17 disposed to the side of the saw blade 1 for scanning the back thereof.
  • two guides, 15, 16 are extending upwards from the rail at the side where the back of the saw blade is passing.
  • the back of the saw blade is resting against the guides while moving.
  • a third guide is situated between the two other guides and constitutes the measuring sensor of a gauge 17 which touches the back of the saw blade back.
  • the sensor guide is in line with the two others. If it deviates from this plane in either direction, the saw blade is not straight.
  • the feeler gauge 17 generates a signal if the back of the saw blade deviates from straightness and also delivers this signal to the control unit 6.
  • a band saw blade is preferably processed as follows: At first the tension of the band saw blade is tested and the requisite tension is rolled in. For this purpose the feeler gauge 13 is set to zero at both tire lines 18 prior to the start of the processing. Then the rolling is started in the centre or slightly displaced towards the teeth. After the first track in the centre of the band saw blade, the feeler gauge and the roller direction are displaced a short distance, e.g. 1 cm, closer to the back, where the next passage occurs. The next following track lies on the other side of the central track towards the teeth. In this way, displacement always occurs alternately towards the back and towards the teeth, until all tracks provided have been rolled. It has proved desirable to roll approximately eight tracks in this manner in order to achieve the requisite tension in the band saw blade. Depending on requirements, it is also possible to provide fewer or more tracks and also several passages per track. For instance it is sometimes advisable to start again from the centre and roll tracks half way between the tracks rolled in the first sequence.
  • rollers may press onto the saw blade during parts of a track only.
  • the straightness of the saw blade is tested and, if necessary, corrected.
  • the back of the straightened blade is then tested again. If the back is too short, then a further run must be made. This is effected by rolling processes on both outermost continuous tracks, i.e. directly on the back and directly behind the teeth.
  • a depression in the back recorded by the feeler gauge 17 away from the feeler gauge 17 indicates that the back is too short and achieves a rolling procedure in a zone between the back and a so-called tire line about 25,4 mm (1 inch) from the back in the sense of an elongation of this track.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Claims (2)

  1. Un appareil de mise en tension à lame continue avec une station de mesure pour mesurer la tension dans la lame continue, comprenant un support plat (10) pour la lame (1) et une station de tensionnage (4) pour enrouler de la tension dans la lame continue, des cylindres (14) qui sont disposés à l'opposé l'un de l'autre au-dessus et en dessous de la lame continue avec des surfaces courbées et un dispositif pour presser les cylindres simultanément contre la face inférieure et la face supérieure de la lame continue et une unité de contrôle (6) pour le traitement du signal de mesure et pour générer un signal de contrôle au dispositif afin de presser les cylindres,
    caractérisé en
    un dispositif pour le guidage de la lame par-dessus un point à un niveau plus élevé comparé au niveau du support, où ledit dispositif est situé à une distance avant ladite station de mesure de façon à ce que la lame suive une courbe libre depuis ledit point élevé vers le support plat, permettant ainsi la libération de la tension de la lame en une section transversale courbée; un gabarit courbé (11) dans la station de mesure transversale à la lame, où une sonde de mesure (13) est bougée le long dudit gabarit touchant la surface de la lame avec une tige palpeuse, où la courbature du gabarit correspond à la courbature souhaitée de la lame libérée de tension et où ladite station de mesure génère un signal de mesure.
  2. Un appareil de mise en tension à lame continue selon la revendication 1, caractérisé en ce que ledit appareil comprend une sonde (17) additionnelle pour scanner le dos de la lame et générer un deuxième signal de mesure en cas de déviation rectilinéaire du dos.
EP96111742A 1996-07-22 1996-07-22 Machine à tensionner des lames de scies à ruban Expired - Lifetime EP0820829B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE69622032T DE69622032T2 (de) 1996-07-22 1996-07-22 Verbesserte Bandsägeblatt-Spannmaschine
DE0820829T DE820829T1 (de) 1996-07-22 1996-07-22 Verbesserte Bandsägeblatt-Spannmaschine
EP96111742A EP0820829B1 (fr) 1996-07-22 1996-07-22 Machine à tensionner des lames de scies à ruban
US08/896,082 US6105466A (en) 1996-07-22 1997-07-17 Band saw blade tensioning machine
CA002209975A CA2209975C (fr) 1996-07-22 1997-07-21 Tendeur de scie a ruban

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96111742A EP0820829B1 (fr) 1996-07-22 1996-07-22 Machine à tensionner des lames de scies à ruban

Publications (2)

Publication Number Publication Date
EP0820829A1 EP0820829A1 (fr) 1998-01-28
EP0820829B1 true EP0820829B1 (fr) 2002-06-26

Family

ID=8223018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111742A Expired - Lifetime EP0820829B1 (fr) 1996-07-22 1996-07-22 Machine à tensionner des lames de scies à ruban

Country Status (4)

Country Link
US (1) US6105466A (fr)
EP (1) EP0820829B1 (fr)
CA (1) CA2209975C (fr)
DE (2) DE820829T1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4578748B2 (ja) * 1999-06-18 2010-11-10 イーゼリー、ウント、コンパニー、アクチエンゲゼルシャフト、マシーネンファブリーク 無限帯のこブレード誘導方法、帯のこブレードのテンションの測定および設定を行う装置、および無限帯のこブレード誘導方法を実施する装置
CA2582208A1 (fr) * 2006-03-21 2007-09-21 Walter Oppliger Machine a dresser les dents pour lames de scie a ruban
US20140259699A1 (en) * 2013-03-14 2014-09-18 Benjamin Yang Flexible saw blades and methods for curvature cutting
ITRM20130262A1 (it) * 2013-05-03 2014-11-04 Scm Group Spa Macchina per la lavorazione di pannelli.
US9902000B2 (en) * 2015-04-20 2018-02-27 HE&M Inc. Band saw blade sensor and control system
US10150172B2 (en) * 2015-04-20 2018-12-11 HE&M Inc. Band saw blade sensor and control system
DE102015122262A1 (de) * 2015-12-18 2017-06-22 Georg Kesel Gmbh & Co. Kg Vorrichtung und Verfahren zum Transport von Sägebändern unter der Berücksichtigung der Wechselkrümme
CN109822159A (zh) * 2019-03-19 2019-05-31 山东宏康机械制造有限公司 一种新型带锯床
DE102020116150A1 (de) * 2020-06-18 2021-12-23 Keuro Besitz Gmbh & Co. Edv-Dienstleistungs Kg Verfahren zum Vorhersagen der Restlebensdauer eines Sägebands und Bandsägemaschine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1010647A (en) * 1973-05-31 1977-05-24 Francis E. Allen Roll tension monitor for saw blade
US3919900A (en) * 1974-12-09 1975-11-18 Letson & Burpee Ltd Automatic roll tensioning method and apparatus
CA1071978A (fr) * 1977-12-07 1980-02-19 Thomas Bonac Mecanisme de regulation de la tension d'une scie a ruban
US4321849A (en) * 1980-05-19 1982-03-30 Hobart Corporation Tension adjustment for a band saw
US5237897A (en) * 1987-03-02 1993-08-24 Seneca Sawmill Company Automatic bandmill strain and saw tracking method and apparatus
US4852430A (en) * 1988-03-04 1989-08-01 Walter Oppliger Band saw straightening apparatus
WO1992019407A2 (fr) * 1991-05-02 1992-11-12 Firma Rudolf Alber Gmbh & Co. Kg Machine a dresser pour lames de scie a ruban et procede pour dresser les lames de scie a ruban
EP1184121B1 (fr) * 1995-05-16 2004-03-17 Vollmer Werke Maschinenfabrik Gmbh Procédé et dispositif pour mesurer et corriger le profil de tension de lames de scies
DE19622428C1 (de) * 1996-06-04 1997-07-24 Vollmer Werke Maschf Vorrichtung zum Richten langgestreckter Sägeblätter, insbes. für Bandsägen

Also Published As

Publication number Publication date
US6105466A (en) 2000-08-22
EP0820829A1 (fr) 1998-01-28
CA2209975C (fr) 2006-05-09
DE820829T1 (de) 1998-05-28
DE69622032D1 (de) 2002-08-01
DE69622032T2 (de) 2003-02-06
CA2209975A1 (fr) 1998-01-22

Similar Documents

Publication Publication Date Title
EP0820829B1 (fr) Machine à tensionner des lames de scies à ruban
ES8203125A1 (es) Perfeccionamientos en dispositivos para medir y-o registrar las irregularidades
CA1051324A (fr) Methode permettant de scier le bois en grume pour en faire du bois de construction
CA1056274A (fr) Utilisation et outillage de scierie a ruban
US8230709B2 (en) Measuring straightness of an elongated rolled workpiece
US4852430A (en) Band saw straightening apparatus
ES2005564A6 (es) Dispositivo de medicion de la anchura de las zonas de presion yno de la presion superficial entre una bobina de una banda continua de material y un rodillo presionado contra la bobina y procedimiento para bobinar una banda continua de material.
CA2072803C (fr) Machine pour redresser les lames de scies circulaires
GB1591173A (en) Measuring and checking device for roller tracks comprising juxtaposed rollers
JP4722320B2 (ja) 鋸刃のドレッシング方法および装置
KR940006655A (ko) 조(粗) 압연기의 유도장치 및 압연제품의 유도방법
US5819613A (en) Saw mill apparatus and method
CA1317327C (fr) Dispositif assurant l'alimentation appropriee d'une bande continue a contour profile vers une presse a decouper
US5908989A (en) Method and apparatuses for measuring and correcting the stress profile of saw blades
US6745644B1 (en) Method for guiding an endless band-saw blade
CA2168538C (fr) Dispositif permettant de regler un des paliers d'un rouleau
WO1997021527A9 (fr) Installation et procede de sciage
CA1312810C (fr) Dispositif a redresser une scie a ruban
KR20060005377A (ko) 가압 벨트의 행로를 보정할 수 있는 프레스
JP4160943B2 (ja) 鋼板の幅方向伸び率分布測定方法およびその装置
JPH0698570B2 (ja) レール頭部の仕上装置
CA1256784A (fr) Dispositif de redressement de pieces parfaitement cylindriques deformables a froid
RU2818600C2 (ru) Способ и устройство для определения характеристики поверхности по меньшей мере одной головки рельса
JPH03175001A (ja) 帯鋸の歪取装置
US9459086B2 (en) Shape sensor devices, shape error detection systems, and related shape sensing methods

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR LI SE

DET De: translation of patent claims
17P Request for examination filed

Effective date: 19980728

RBV Designated contracting states (corrected)

Designated state(s): CH DE FR LI SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20010910

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR LI SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69622032

Country of ref document: DE

Date of ref document: 20020801

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020925

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020927

Year of fee payment: 7

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BRAUN & PARTNER PATENT-, MARKEN-, RECHTSANWAELTE

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20021226

Year of fee payment: 8

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: VOLLMER WERKE MASCHINENFABRIK GMBH

Effective date: 20030321

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030731

REG Reference to a national code

Ref country code: FR

Ref legal event code: RN

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

REG Reference to a national code

Ref country code: FR

Ref legal event code: FC

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PLCK Communication despatched that opposition was rejected

Free format text: ORIGINAL CODE: EPIDOSNREJ1

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20050124

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080130

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090203